In the meta-analysis including a total of eleven retrospective studies and one prospective study involving 1630, mostly Asian NSCLC patients with EGFR exon 19 deletions, deletions starting from E746 were significantly associated with longer OS than those with deletions starting from L747 (HR, 0.79; 95% CI: 0.65 to 0.96, p = 0.019), and relatively but not significantly longer PFS (HR, 0.86; 95% CI: 0.69 to 1.06, p = 0.160) [49]. The gene discussed is EGFR; the disease is non-small cell lung carcinoma.